Distributed Cooperative Multicell Precoding Based on Local Channel State Information
Abstract: Cooperative
multicell precoding is an attractive way of improving the performance in
multicell downlink scenarios especially for terminals at cell edges. Multiple
base stations in a given area serve each terminal after precoding, which can
coordinate the inter-cell interference and achieve higher performance. Most
previous work in the area has focus on centralized precoding which requires
gathering all transmitters’ channel state information (CSI) at central station
(CS) through backhaul and then precoding at CS. However, the requirements on
backhaul signaling and computational power scales rapidly in large and dense
networks, which usually make such fully centralized approaches impractical. In
this paper, we study two practical precoding strategies with only local CSI
under a relatively realistic scenario. Performance is finally illustrated
through numerical simulations.
Keywords: cooperative mulicell
precoding, distributed precoding, virtual SINR, block diagonalization
Author: Jing An, Guofeng He,
Youwu Xu, Bin Wang, Sen Xu
Journal Code: jptkomputergg150128
